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Reco-Boxx ZXR / ZXA / Flat – Operation and maintenance instructions
[03/
2022 ]
9.19 Type 19: Alarm indicating that the hours limit for the maintenance of the filters has
been reached
• Conditions:
• The hours limit must be configured with a value greater than 0..
• Causes:
• The hours limit for the minor maintenance has been reached.
The instructions in this manual of the unit for the 3 months maintenance should be followed. Mainly,
the filters should be cleaned or replaced.
Reset the hours for minor maintenance after this operation, this will reset automatically the alarm and
give it again after the same period.
• Effects:
Displayed on Touchpanel
Code
Text displayed
Level
M.10
NOR MAINTENANCE ALARM
1
TAC control board
ALARM OUTPUT
AL dPa OUTPUT
LED ALARM
Fans
/
/
ON
/
Auto reset: via dedicated reset
9.20 ype 20: Alarm indicating that the defrost process is active
• Conditions:
• GUnit with counter flow heat exchanger.
• Causes:
• The ice forming inside of the plate heat exchanger is genrating a pressure drop that is too high
for the current airflow. This detection requires a Modbus pressure sensor (Art.-No. 0043.1119
(Reco-Boxx ZXR/ZXA); (Art.-No. 0043.0967 Reco-Boxx Flat-H/-OUT) DDS placed on the heat
exchanger and that the modulation of the fans speed is based on the airflow and not on torque.
• When the previous detection is not available, the supply T° is checked and if it falls below 11 C, it
is considered that is due to the ice that reduces the heat exchanger efficiency.
• Effects:
Displayed on Touchpanel
Code
Text displayed
Level
A.20
Defrost
1
TAC control board
ALARM OUTPUT
AL dPa OUTPUT
LED ALARM
Fans
/
/
ON
/
Auto reset: yes
